Even if the ad versions are covers "in the style of " the original , most people want the best version of the song. Though sometimes you get great ad versions of songs like What A Wonderful World for the Suzuki ad and Hard Rain for some other SUV which are far removed from the original and inexplicably unavailable commercially,
The worst one is the total destruction of You've Got A Friend for The AA with its ridiculous bad cut phrasing. The guy can sing , but the song is ruined by the atrocious editing (assume to fit with the ad)